William



' To lall iohom 'it may concern:

. Be it known' that I, WILLIAM4 J HAYs, ofthe oity and improvedGasstove; and I do hereby declare that i my improved gas-stovethe planeof section beingjnl the said gas-passages, as hereinafter more fully de'I "one aperture-in the centre, leading to a vertical pipe,

B, that projects from thegboX.

` width,but not in height, are placedupon the vboxA,

and e,'respectively, around' the same.

- V f anni ,sans

WILLIAMJQHAYS, our NEW YORK, Nrv.

dazed Decembe 14, 1869.

@Asis-rave.

'.ihe` Schedule referred to in these Letters Patent and making part ofthe same.

county, and State ot' New York, have invented a new the following is afull, clear, and exact description thereof, which will enable othersskilled in the art to make anduse the same, reference being had to theaccom# panyng drawings, forming part of this specification, in which-Figure 1 represents a vertical longitudinal section of dicated by theline a: x, fig. 3.

Figure 2 is avertcal transverse sectionof the same, Ehe plane of sectionbeing indicated by the'line y y, Figure 3 is a.V horizontal section ofthe saine, taken on the planeot' the line z z, iig; 1.

Similar letters of reference indicate corresponding parts. y Thisinvention has for itsobject to construct a gasstove with' an extendedradiating surface, and with proper. air-channels, `so that with acomparatively small amountof heat .the air in 'an ordinary-sized roomcan be' properly warmed; i

The invention consists in the construction of annular air-passages,arranged within and around annular gas-passages, and in thev connectionwith each other of scribed.

A, in the drawing, represents a tire-box, of cylindrical or otherequivalent form, adapted to receive the gas or oil-burners, from theflames of which the requisite heat is to be derived.

The box A is covered by a plate, a, which has only Four vertical pipes,Q, D, E, and F, diiering in around .the pipe B, forming annular chambersb, c, d,

same, whence they are conducted by a horizontal pipe,

g, into the upper part of the chamber' c,

From this chamber they are, through another transverse pipe, h,y whichmay be near the lower end of the vertical fines, conducted into thechamber e, whence ,they escape-into the smoke-pipe i.

The products of combustion, wliilepassing from the tire-box A to thesmoke-pipe,;1no ve along all the pipes B, O, D, E, andi?,- and heattheir surfaces. .l

Cold air entersthe lower end s 'ofthe chambers b d, through horizontalpipes jkrespectively, and is, while ascending in the chambers 1 d,exposed to the heatedsurfaces of the pipes B, O, D, and E, while thepipe.

F will heat the air surrounding theapparatus. Thus the heat of theburning gas or oil is almost entirely t utilized.

Itis evident that ythe number pipes on the iirebox may be varied, andthat thereby the invention is applicable to heat-ers of greater or lessextent.

Having thus described my invention,

I claim as new, and desire to secure by'Letters Patentand described.

WM. J HAYS.

Witnesses:

Gao. W. Manna, ALEX. F. ROBERTS.

